Injector.



PATBNTBD DEG. 19, 1905.

G. W. MASON.

INJECTOR. APPLICATION FILED MAY 1o, 1905,

- ENTTED sTATEs PATENT OEETOE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application iiled May 10, 1905. Serial No, 259,673.

To all whom it may concern.-

` Be it known that I, GEORGE W. MASON, a citizen of the United States,residing at Sharon, in the county of Mercer and State of Pennsyl- Vania,have invented certain new and useful Improvements in Injectors; and I dodeclare the following to be afull, clear, and exact description of ltheinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this specication.

This invention relates to an improved injector for lifting and forcingWater into steamboilers; and it consists in the certain details ofconstruction and combination of parts, as will be fullydescribedhereinafter.

In the accompanying drawings, Figure 1 is a side central sectionalelevation of my improved injector, the same being constructed andarranged in accordance with my invention. Fig. 2 is an outside elevationof the same. Fig. 3 is a sectional plan view of a portion of theinjector, the said section being taken on the liney y of Fig. 1. Fig. 4is a sectional end elevation of the shell of the injector, the sectiontaken on the line .z of Fig. 1.

Fig. 5 is a full-sized end elevation of the stuff' ing-box removed fromthe shell. Eig. 6 is a side elevation of the same. Fig. 7 is an endelevation of the forcing-tube detached from the injector. Eig. 8 is aside elevation of the same.

To construct an injector in accordance with my invention, and therebyprovide a means of injecting water into steam-boilers, either underpressure or at rest, I form from cast metal a shell 1 of a suitable sizeand form of construction, the said shell comprising a main body portion1, having a central bore, a steam connection or inlet 7, a water-inlet,14, an overiiow-passage 15, a cylindrical overflow-chamber 3,communicating by a passage 13 with the bore of the main shell and withan inlet-passage 5 to the boiler. Arranged within the shell 1 are threetubes, the one in line with the other, the middle one, 42, of which isattached by means of a screw-thread and formed with a central taperingbore 41, the entrance of which is located over the water-inlet 14. Thesteam-forcing tube operating in connection with the stationary tube 42consists of a tube 44, having a nozzle 43, adapted to be adjusted towardor away from said stationary tnbe or project into the mouth of the same.This movement of the tube 44 is accomplished by forming the same with arearwardly-projecting stem 51, having a handle 53 on its free or exposedend and an intermediate threaded portion 54, operating in a threadedplug 50, and the said plug formed with a stuiiing-boX 52 to make asteam-tight connection. The forward end of this last-described tube 44is supported and guided in an internal-arrange stufing-box consisting ofa threaded body portion 45, located at one side of the waterinlet' 14, apacking 46, and a threaded gland 47. These two ports forming thestuiiing-box form a partition for the steam-chamber 11, the steamentering the tube 44 through openings and are placed or removed byengaging suitable wrenches in end grooves 48 of the outer member and afiattened portion of the inner part, as will be best seen by referenceto Figs. 5 and6 of the drawings. By this construction and arrangement ofthe tube 44 the same may be adjusted toward or away from the entrance 41of the stationary tube 42, and thereby afford a means of increasing ordiminishing the quantity of Water injected through said stationary tube.If the water is supplied to the injector under pressure, the nozzle 43of the steam-tube is moved into the mouth of the stationary tube 42 topartly close or reduce the area of the opening 41; but if the water isto be lifted the said nozzle 43 is lnoved back to give a free inlet forthe same.

At the front of the stationary tube 42 and in line therewith is aforcing-tube 35, having* an enlarged tapering entrance 36 and a reducedcylindrical exit 37, the said forcing-tube being formed'with twoperipheral anges 38 and 39, the one having a series of perforations 38'and the other, 39, forming a valve to close direct communication betweentwo chambers 12 and 28, formed by a partition 40, through whichthe inletend of the forcing-tube 35 projects. This forcing-tube 35 is capable ofbeing moved in the direction of its length by the action of the waterand steam passing through the injector and will automatically regulatethe distance between itself and the exit end of the stationary tube 42.The chamber 28 immediately above the overflow-exit 15 is formed integralwith the casing 1 and is provided at the top withan opening 30, closedby a check-valve 34, the said valve being held in position by ascrew-cap 33. At each side of the chamber 28 are formed downwardlyextending passages 31, leading to and in communication with theoverflow-passage 15.

Arranged within the chamber 3 is a sliding valve-stem 18, the inner endof which is formed with a valve 17, adapted to open or close a passage16 to the overflow 15, and the said chamber connected by a passage 13 tothe chamber 12 above.

Pivoted on a stud 27, formed integral with the shell 1, is a hand-lever23, having an eccentric portion 23 and formed with integral stops 24 and25 to limit the movement or throw of said lever in either direction.Attached to the eccentric portion 23 of the lever by means of a stud 21is a connecting-bar 22, the other end of which is loosely attached to apiece 20, held fast to the free end of the valve-rod 18 by nuts placedat either side in a manner that, by moving the lever 23 to the positionshown in dotted lines at Fig. 2, the valve 17 will be moved from itsseat 16 to open a passage from the chamber 12 above to theoverflow-passage 15.

In operation the steam-inlet 7 is connected by a pipe with thesteam-dome of the boiler, the said pipe being fitted with a valve toregulate and control the iiow of steam therethrough, and with anintermediate strainer 10, which I prefer to be cup-shaped, open at thebottom and formed with pcrforations at the top and sides. Theentrance-pipe 5 to the boiler is introduced below the water-level andthe water-inlet pipe attached to its proper connection 14.

To start or put the injector in operation,

the hand-lever 23 is moved to the left to the position shown in dottedlines, thereby moving the valve 17 vfrom its seat. Steam is now turnedon and passing through the strainer 10 into the openings 55 through thetube 44 into the stationary tube 42, creating a vacuum at the point ofjuncture of said tubes, which will draw or lift the water through theinlet 14 and force the same th rough the stationary tube 42 into thechamber 28. The pressure of steam in the chamber 28 will lift thecheck-valve 34 from its seat and permit a portion of said steam toescape through the two passages 31 to the overflow 15, and the balanceof steam forced through the forcing-tube 35 into the inlet-pipe 5, wherethe back pressure of the boiler will return the steam through theperforations 38 to the overflow 15 through the medium of passage 13 andvalve-opening 16. This forward pressure of the steam entering the tube35 will cause the same to move back from the stationary tube 42 topermit a free passage of the water therefrom. When a good flow of wateris running from the overiowpassage 15, the hand-lever is thrown back toits former position, closing the valve 17 on its seat, which causes theback pressure of the boiler to move the forcing-tube 35 to its formerposition and create a partial vacuum in the chamber 28 and instantlyclose the checkvalve 34. When these two valves are closed, the water islifted and injected through the tubes 42 and 35 into the boiler.

The above-described injector has been thoroughly tested, and it has beenfound that it will inject more water into the boiler than any other nowon the market. It has worked successfully with steam-pressure as lowasten pounds. It has been tested with water at very high temperaturesand gave complete satisfaction aud will lift water at rest to a heightabovetwenty feet and will work equally as well under any water-pressure.

Various slight modifications and changes may be made in the details ofconstruction without departing from the spirit of the invention.Therefore I do not wish to confine myself to the exact constructionshown and described, but wish to claim all such modified forms as wouldcome properly within the general scope of the invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. An injector comprising a shell provided with water and steam inlets,exit and overiiow passages,said shell having arranged therein a combinedstationary lifting and forcing tube, an adjustable steam-forcing tube atone end and inline therewith, and a self-adjusting forcing-tube havingseparate overiiow-passages leading from either end thereof, also in linewith and at the other end of said stationary tube.

2. An injector comprising a shell provided with water and steam inlets,exit and overflow passages,said shell having arranged therein, acombined stationary lifting and forcing tube, an adjustablesteam-forcing tube at one end and in line therewith, said tube operatingthrough an interior arranged stuflingbox, whereby steam-tightcompartments are formed, and a self-adjusting forcing-tube havingseparate overiiow-passages leading from either end thereof, also in lineIwith and at the other end of said stationary tube.

3. In an injector, the combination comprising the shell having water andsteam inlets, exit and overflow passages, said shell having arrangedtherein a stationary lifting-tube 42 an adjustable steam-forcing tube 44operating through a stufling-box, and means for moving the same towardor away from said stationary tube to open or close the entrance,achamber 28 at the forward end of the stationary tube, an opening fromsaid chamber to the overflow, a check-Valve 34 operating to open orclose said opening, a self-adjusting forcingtube communicating withthechamber 28 and exit-pipe 5, and a separate overow-passage 13 with valve17, to o'pen or close said passage, as and for the purpose described.

ISO

tube having separate overioW-passages leading from either end thereof,said tube cornprising a cylindrical body portion having an enlargedentrance, a reduced exit and peripheral flanges, one of which isperforated to per- Init the Water to return to one of theoverflow-passages.

In testimony whereof I affix my signature in presence of two Witnesses.

GEORGE W. MASON.

Witnesses:

FRANK B. BARR, KATHERINE A. MURRAY.

